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Emerson epro MMS6120 Dual Channel Bearing Vibration Monitor
The Emerson epro MMS6120 (9100-00002) is a dual-channel bearing vibration monitor module developed for the MMS 6000 system framework. Powered by redundant 24VDC inputs, it captures absolute housing vibrations utilizing electrodynamic velocity sensors. It delivers 4-20mA analog telemetry, raw dynamic AC outputs, and features integrated HART-like diagnostic processing via RS-485 communication to safely manage high-speed industrial turbomachinery.
Description
Product Overview
The Emerson epro MMS6120 is an industrial-grade, dual-channel bearing vibration monitoring module built for integration into the MMS 6000 Machine Monitoring System architecture. This distributed control subsystem card processes complex dynamic signals from electrodynamic velocity transducers to track real-time absolute bearing housing vibrations. Operating as either a standalone component or within networked multi-channel racks, this critical asset delivers continuous machine protection data to plant distributed control systems (DCS), analysis networks, and safety-critical PLC environments.
Advanced Capabilities and Functional Benefits
- Dual-Channel Processing and Versatility: While often misclassified as a single-channel speed device, this unit features two entirely independent differential inputs tailored explicitly for vibration velocity sensors. It accurately measures true Root Mean Square (RMS) vibration velocity, along with zero-to-peak and peak-to-peak vibration displacement.
- Integrated Predictive Diagnostics: The module incorporates built-in microcontroller functions that process advanced order analysis. Operators can extract values for three selectable harmonics alongside their corresponding phase angles via RS-232 and RS-485 interfaces to detect early-stage structural or mechanical degradation.
- Comprehensive Self-Checking Infrastructure: A continuous internal hardware supervision loop actively monitors sensor window thresholds, checks system supply voltages, verifies parameter settings, and tests for field cabling short circuits or breaks, visually alerting technicians via front-facing channel-clear LEDs.
- Sensor Sag Compensation: Each input channel provides an isolated, buffered lifting coil current output capable of delivering up to 0.8 mA. This specialized current compensates for the physical mechanical sag of heavy electrodynamic transducers, maintaining calibration integrity over long operational lifetimes.
Technical Specifications
| Parameter | Specification Details |
|---|---|
| Manufacturer | Emerson (epro GmbH) |
| Product Subsystem | MMS 6000 Machine Monitoring Series |
| Model Number | MMS6120 |
| Order Number | 9100-00002 |
| Module Classification | Dual Channel Bearing Vibration Monitor |
| Compatible Transducers | Electrodynamic Velocity Type (PR 9266/xx to PR 9268/xx) |
| Input Channels | 2 Independent Differential Inputs (Galvanically Isolated) |
| Input Resistance | 100 kΩ |
| Standard Frequency Range | 10 Hz to 1000 Hz (Compliant with VDI 2056 / ISO 3945) |
| Extended Frequency Limits | 5 Hz to 1600 Hz (Selectable via software) |
| Analog Current Outputs | Dual 0/4 to 20 mA Proportional Outputs (16-bit resolution) |
| Dynamic AC Signal Outputs | Dual 0 to 20 Vpp outputs via rear strip and front SMB sockets |
| Communication Bus | RS-232 (Front Configuration) / RS-485 (Rear Diagnostic Bus) |
| Supply Voltage Range | 18 to 31.2 VDC (Dual Redundant Inputs) |
| Power Consumption | Maximum 6 W (250 mA at 24 VDC) |
| Operating Temperature Range | 0°C to +65°C |
| Form Factor / Dimensions | Standard Eurocard PCB (128.4 mm Height x 30.0 mm Width x 160.0 mm Length) |
| Net Hardware Weight | 0.32 kg (Approx. 320 grams) |
Industrial Applications
- Turbomachinery Protection: Continuous tracking of absolute bearing housing vibration in steam, gas, and hydro power generation turbines.
- Heavy Industrial Compressors: Real-time stress and displacement monitoring across high-velocity multi-stage process compressors.
- Manufacturing and Refining Utilities: Protecting high-capacity induction fans, centrifuges, and balancing systems in petrochemical operations.
- Rotational Infrastructure Maintenance: Providing high-resolution data streams directly to plant diagnostic systems to drive predictive maintenance scheduling.
Additional information
| Weight | 0.3 kg |
|---|---|
| Country of Origin | USA |
| Dimension | 3 x 19 x 12.7 cm |
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